Kapteyn may refer to:
- Jacobus Kapteyn - Astronomer
- Parallactic instrument of Kapteyn - the instrument used by Kapteyn to analyze photographic plates
- Jacobus Kapteyn Telescope - telescope named after Jacobus Kapteyn
- Kapteyn's Star - star named after Jacobus Kapteyn
- Kapteyn (crater) - Lunar crater named after Jacobus Kapteyn
- Kapteyn Astronomical Institute - Dutch Astronomical Institute named after Jacobus Kapteyn
- Paul Joan George Kapteyn - Dutch Judge
This disambiguation page lists articles associated with the title Kapteyn.
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